Multiple-plate reinforced glass and process of producing same.



A. BARDIN. MULTIPLE PLATE REINFORCED GLASS AND PROCESS OF PRODUCING SAME. APPLICATION FILED APR. 25. 1914.

13, 135,, Patented Apr. 17, 1917.

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MULTIPLE- PLATE REINFORCED GLASS AND PBOCESS 01? PRODUCING SAME.

ticularly with a multiple-plate reinforced glass in which the individual plates. are

1 united or cemented together to form a unitary article.

The general objects of the invention are to provide a comparatively simple and inexe of varmsh plyin a pensive reinforced and armored transparent multiple-plate glass in which the reinforcing substance is thoroughly protected by the coated sides of the plates of glass -being placed in contact and united. I In carrying out the invention the reinforced glass plates to be united have their juxtaposed surfaces coated with varnish or equivalent material, and under the coating of one or both plates is a rein forcing film composed of successive layers or deposits of gelatin, celluloidand gelatin. The varnish on the plates of glass is allowed to-harden before the union of the plates is attempted, and in order to unite the plates the surface of the varnish is softened by apsolvent thereto, such'as alcohol, and

. then t e two plates are immediately ut'tothe varnish hardens.

gether and pressed tightly, so that t e varnish on one plate will unite with of the other plate, whereby the plates become permanently united as a single article when Obviously, more than two plates may be combined together in this mannerwith reinforcing Iif'aterial between H 6 sultable means may be each pair of adjacent plates. A s mple method ofperforming the process is to dip, the coatedplates in a bath of.- alcohol or equivalentsolvent, and while in the bath press-the plates together as tightl as pos sible, and then finallyremove t e plates from the alcohol, and also to tightly combine the plates. V

For a more complete of the the varnish.

"gether as then removed and sub ected to further presbath and still further press them together so as to force outfrom between the plates any excess specification of Lettei's Patent. patgnted Apr. .1? 19 17 Application filed April 25, 1914-. Serial no. 834,371.

I invention reference is to be had to the following description andclaims taken in connection with the accompanying drawing, in Which I Figure 1 is a sectional view of a tank of alcohol with two platesiimmerseil therein but out of contact; i

Fig. 2 is a similar view showing the plates pressed together Fig. 3 is a view showing the plates removed from the bath and being finally pressed together'to exclude air and alcohol from between the plates;

Fig. f is a sectional view of a triple-plate reinforced glass; and

Fig. 5 is a sectional view of a plate of glass showing the various layers that go to make up'the reinforcement.

Referring first to Fig.- 5, it will be observed that the plate of glass 1 is provided with superimposed layers of gelatin 2, celluloid 3, gelatin'& and varnish 5, the purposes of which and the manner of application being fully set forth in the application for Letters Patent hereinbefore referred to.

The process of uniting plates of glass rcinforced as described consists in dissolving only the surface of the outer coating of the reinforce, namely, the varnish 5, and then pressing two or more plates together so that the varnish of one will unite or coalesce with the varnish of the adjacentplate, whereby a permanent union is'eifected. The soften ng or dissolving of the surface is effected by placing the varnish-coated plates A. and A in a tank B containing alcohol or equivalent liquid C. The alcohol acts on the surface of the external coating of the reinforce to soften the varnish slightly, and while the plates are in the bath they arev pressed toshown in Fig. 2. The plates are sure for more intimately uniting the varnish 'of' 'one plate with that of the other.

the plates are placed this step. For instance,

employed to perform Any on a table D, Fig. 3, and aroller or equivalent device E run overthe top late A, for pressing the same against the un er plate A. -After thisoperation the plates are set away to allow the varnish to thoroughly harden. It isito be understood that only one of the plates need be provided with the reinforcing coating ofcelluloid and gelatin and an external protective coating --'of varmsh, and

' inforced plates.

The method of uniting a plurality of plates may be adapted for a triple-plate 7 glass as shown in Fig.4, wherein the several plates are designated by the character 6 and the reinforcing coating by the character '7. It will be noted that the intermediate plate 6 is coated on both sides while the outer plates are coated only on their inner faces. Obviously, a multiple-plate glass embodying more than three plates may be made in the manner just described.

Having thus described my invention, I claim as new and desire to'secure by Letters Patent:

1. The herein-described process of making multiple-plate reinforced glass, which consists in applying to a glass plate superimposed layers of gelatin, celluloid, gelatin and varnish; applying to another plate a layer of varnish; immersing the plates after the varnish hardens in a' bath of solvent; pressing the varnished sides of the plates together while in the-bath; and finally pressing the plates together out of the bath to force out solvent from between the plates.

2. A multiple-plate reinforced glass comprising a plate of glass having superimposed layers of gelatin, celluloid, gelatin and varnish; and a plate of glass havln a layer ,of varnish united with the layer 0 varnish of the first-mentioned plate.

In testimony whereof I have signed my name to this specificationjn the presence of two subscribing witnesses.

ABEL BARDIN.

Witnesses:

CHATTAN BRAnwAY. PHILIP D. ROLLHAUS. 

